Whistle.



H. w. AYLWARD.

WHISTLE. APPLICATION IILED JAN. 22, 1908.

Patented Dec. 29,1908.-

Inventor aavli 3w I Attbmeysl Witnesses UNITED srnrns PATENT QFFICTELHENRY W. AYLWARD, or NEW YORK, N. Y., ASSIGNOR To THE SIGNAL ANi)ooN'rRoi. COMPANY, A (CORPORATION or NEW YORK.

WHISTLE.

Specification of Letters Patent.

No. eospca.

Patented Dec. 29, 190$ Application filed January 22, 1908. Serial No.412,140.

To all whom it may concern:

Be it known. that I, HENRY W. AYLWARD, a citizen of the United States,residing in the borough of Brooklyn, city of N ew York, and State of NewYork, have invented a new and useful Whistle, of which the following isa specification.

My invention relates to improvements in electrically operated whistles,such Whistles being particu arly adapted 'for signaling purposes onships of war, although they are applicable. for other uses.

The objects I have view are to produce a Whistle which will be cheap tomanufacture, certain in its oration, and the parts so made as not to be'ikely to et out of order, and which will be protecte from moisture andfrom freezing. These and other objects will more fully appear from thefollowing specification and accompanying drawings, considered togetheror separately. I attain these objects by the mechanism illustrated inthe accompanying drawings, in Which- Figure 1 is a side elevation partlyin sec-.

tion of a Whistle and its operating mechanislfn embodying my invention.Fig: 2 is a horizontal section of the same on the line 22 of Fig. 1.Fig. 3 is a vertical section on the line-3-3 of Fig. 2; and Fig. 4 is ahorizontal section on the line 4-4 of Fig. 1.

In all of the views like parts are designated by the same referencecharacters.

In carryini out my invention, I provide a base 1, whic is preferablymade integrally with the Whistle how 2, and the valve chamher 3. U onthe whistle bowl. is carried the hell 4 of t e usual steam whistle Themagnet casing 5 is carried 11 on the base above the valve chamber andres alongside of the bell. The main steam inlet 6, as shown, liessubstantially in the center of the base.- A line drawn through thecenter of this inlet and extending upward above the base will liesubstantially equidistant between the bell and the magnet casing. Thebell and magnetcasing are substantiallyofi the same size, and lying asthey do, eikuidistant from the center line of the base, t e produce asymmetrical and Well balancei structure. The main valve 7 is a puppetvalve and moves toopen and close in a vertical direction. The valve isprovided with a stem 8, which extends through the valve chamber a shortdis tance below the latter. This stem may be engaged by a lever (notshowfil) whieirmay 10, which plays Within a cylindrical Xtfi sion 11,formed upon the valve create 3.

The piston 10 is provided with a port 16 permitting communicationbetween the W6 sides of the piston. piston is dished, assho'wn. he er;10 is? much smallr than the passageezi osed' the opening of the pilotvalve, Whirl he described further on. The'piston l0 isi pre'f erablyconsiderably larger than the men valve 7. The main steam valveis' bane dby the pressure on the o" posits sides of fi piston 10. The valve, vave'stem and are preferably integrally formed, as s own; The main ste'amin et 6', Where it' enters the" valve chamber 3, divides into twobranches 12 rind 13, which pass up on opposite; sides of the valve seat14, uniting together in an annular chamber 15 above the valve seat, andvin communication with the cylindrihal-eiitefi=' sion 111 p vcommunicates directly with the bowl 2 of the" The up at face of arewhistle, branches at 1'7, and passes thro iigli each side of the centralstandard 18, as shown? in Fig. 2', such standard lying Within the valvechamber 3, and carrying the valve'sati 14 thereon. The interior of thisstandard communicates with the branches rundthe annular vchanther 15.The cross-sectional areas of the branches 12, 13 and 17 are pref era'blymade the same so that there will be ne'- choking action of the steam inpassiii through the Whistle, The arrangemeiito' the ports and'thebranches in the steam pas-f sages produces a very compact structure andcan by suitable coring be made of a single casting.

The valve chamber 3 is inclosed at thet'o by a plug 19, which carries,referably forn'ie" integrally with it, a stan'a-rd 29, for" sup portingthe magnet casing 5. I This standard 20 is provided with a plurality oflongltudi nally extending ports 21, four being lllUS trated in Fig. 4.

The pilot valve 22 is a puppet valve, open ing when moving downward. Itsstem is" provided with longitudinal ports 23 (see 4) for escape of steamfrom the valve cha her when the pilot valve is 0' cried. lie" pilotvalve is shown as arranged nmneeiaieiy' above, with its center line inline with the centei' line of the main valve, pi'oducing a symmetricalconstruction.

he magnets 24 (but one being illustrated) lie within. the magnet casing5. The arms-- tui'e 25 is above the magnets, and is immedistelyovei'their pole piece This armature is supported 11 on a vertically movablerod 2% W. ioh is apt normally elevated by means of a s ring 27 such rodlying within a sleeve 28. lhis sleeve is screwed into the bottom of themagnet casing, and makes a tight jointtherewith, a nut 29 clamping thelower end of the sleeve. The rod 26 extends down below the magnetcasing, through an opening in the bottom thereof, and lies within thestandard 20, immediately above the stem of the pilot valve. The rod maybe moved some distance before it strikes the pilot valve,whereb y a lost111 tion connection is produced. lhis is an i ipoi'tant feature of myinvention, as the pa ts are moved by the excitation of the mag ets,namely, the rod and armature may acqdire suflicient momentum to 0 en thepilot v lve against the pressure of t e steam, which causes it to remainseated, and also to open the valve, if it has any tendency to stick. Theextent of movement of the rod, caused by the ettmction of the armatureof the magnets, is sui'licient to engage it with the stem of the pilotvalve and open the same a suiiicient distance to permit the ready escapeof steam from the vs. vs chamber 3. The extent of movement however, isnot so great that the valve will not close when the engagement of therod ceases. The lower end oithe rod 29 isprovided with a nut 30, whichnut engages with the lower side of e diaphragm 31, supported by thestandard 20. This diaphragm islfor the purpose of reventing the escapingsteam from striking t e center of the bottom of the magnet casing and.thereby entering the space between the rod 26 and sleeve 28. The cover32 of the magnet casing is provided with 0. depending flange 33, whichproduces a. small chamber shove the magntes Above the magnets 24arranged a die-- phrsgin as, such diaphragm shown) being clamped betweenthe cover 2 end-the body of the magnet casing 5, producing a tight ointto prevent the nos of moisture to upon its sosoee neotod together bybinding posts ed, which ass through c. diaphragm 14:] mode of him;-etion, such diaphragm serving 23.8 a partition to close the openingbetween the junction box and the magnet cssin In operation, the partsnormally in the position as shown in the d'izm'ing gs, the steam inletbeing connected to a source of steam supply, and stccin undo]- thepressure of such supply lying Within the branches 12 end 18 andthcannulsi' chei'nber The same pressure 0i steam exists in thecylindrical extension 11, abo e the piston 10, as the steam has freepassage though the post 10* to both sides of the piston. The main steamvalve 7 will. be closed by its own. Weight and by the pressure oi. thesteam. The armature 25 is normally kept away from the magnets 24 by theaction of the sorin 27, and the pilot valve is nept 111,36

0 oseu position by the 'n'essure of steam within the valve chani 36]. 3.Upon the magnets being energized for the pui'posc of actuating theWhistle, the DJIli'ltl-l'lllC is attracted, which do )rossos the rod 26,and causes its lower enc to cno'sgo with the stem of the pilotvalve .22,opening the letter. The steam then freely-escapes above the piston 10,the port 10 being smaller than the opening exposed by thopilot valve 22,preventing the accumulation of pressure above such valve. The presusroof the steam, thereforeon the lower face of the piston opens the mainvalve 7 a oinst the ressui'e of the steam in the stimulus chem-- or 15,and permits the free escape 0:? steam. through the branches 17-17 intothe valve exhaust port 16, and from thence to the whistle. The uipei'face of the piston 10 bein dished vv'l ermit the piston to rise untilits edge stri (es against the plug 19, which determines the imits of itsupward movement and at the same time permits the pilot valve to remainopen. There will be no mechanical engagement between the valve and thepiston. .lhe main valve will remain open so long as the magnets 24- amexcited. As soon as these magnets are deencrgized, the armature 25 isreleased and elevated by the action of the spring 27. The pilot valve 22is then no longer kept open and is closed by the pressure of steam.luv-sex. face. The stbuin will now above the piston 10 the A the .zncinv' "3* tci'wmthur the o .vl silo. l). ng' 'Ll si o the steam hiiiected,one.

ccnmulotc i.

ii (i diate contact withthe bottom of the magnet casing 5. Shouldanymoisture enter the space between the rod 26 and sleeve 28, at mostitcan pass into the space below the cover 22 and above the diaphragm 34,so that the magnets 24 are effectively protected from moisture.

The. arrangement of the pilot valve below the rod 26, with a spaceseparating the two,

is important in not only producing the lost' motion connection, wherebythe blow delivered against the valve will surely open and in contactwith the head of the valve,

hence no ice can form between the end of the rod 2,6and the up er end ofthe pilot valve, and therefore t e lost motion connection can be reliedupon. at all times.

The arrangement just described is advan tageous in that the head of thepilot valve and the lower end of the rod 26 can be reached foradjustment and examination, through the ports in the standard 20, andare visible at all times.

The vertical moving valves are an important improvement over the priorart, in that they require no springs to move them in' one direction,such movement 'being caused b the action of gravity. The main valve-7 wil res 0nd more uickly than will a horizontal y moving va ve, unless thelatter is provided with a seating spring. The use of a spring isobjectionable, as the action of the steam and the changes in temperaturewithin the valve chamber will seriously affect the sensitiveness of thespring and render the action of the whistle erratic and unsuitable forsignaling purposes.

I have described my inventionin connection with a whistle, but it is tobe understood that certain parts of it may be employed in othersituations, for instance, the arrangement of valves and actuatingmagnets described'may be used for other purposes than admitting steam toa whistle, such means being shown to illustrate a certain feature of myinvention; I wish it understood that certain features of my inventionmay therefore he used in other situations than with a steam whistle.

Iii-accordance with the provisions of the patent statutes, I havedescribed the principle of my invention, together with the apparatuswhich I now consider to represent the best embodiment thereof, but Idesire to have it understood that the a paratus shown is merelyillustrative and tli can be carried out in other ways.

Having now described my invention, what I claim as new and desire tosecure by Letters Patent, is:

at the invention 1. A whistle having a valve, means for.

actuating the valve, the said'means including magnets, a magnet casinsurrounding the magnets, a sleeve passing t rough the casing, anarmature in cocperative re ation to the magnets, a rod passing throughthe sleeve and carrying the armature, a cover for the magnet r casingand a diaphragm interposed between the cover and easing, the said stemengaging throu h the said diaphragm.

2. whistle, havmg 'a steam valve and means for actuating the valve, apilot valve,- a ported standard, magnets, a support therefor, the saidsupport being carried by the standard, means actuated by the magnets foractuating the pilot valve, and a diaphragm on the standard, the said diahra m serving to deflect steam issuing by t e pi ot 'valve from contactwith the magnet support.

3. A whistle having a steam valve, a pilot valve, a plug carrying thepilot valve, a ported standard supported by the plug and connecting withthe valve, in such a manner that the steam escaping from the pilot valvewill exhaust through the ports, and a magnet casing on the standard,there being 0 erative means between the magnet and t e pilot valve.

4. In a whistle, a main ,valve therefor, opening in one direction, apilot valve opening in the direction toward the main valve, the mainvalve having an operating piston, a chamber in which the piston moves,and into which the pilot valve extends,,.0ne face of the piston adjacentto the pilot valve being dished, to permit the pilot valve to be free tomove without engaging with the piston, irrespective-of the )osition ofthe latter.

5. In a whistle, a pilot valve and magneticall operated means foroperating the pilot va ve, there being los motion connection betweensuch means and the pilot valve for imparting ablow to thelatter andunseating it.

-with the diaphragm and the said rod passing

